docs: more garage CLI usage, avoid leaking secret

docs/garage.md

@@ -4,28 +4,62 @@
 
 Requirements:
 
+- `garage` RPC credentials, in the shared keepass, search for 'garage rpc secret'.
 - [Setup WireGuard](./administrative-access.md#ssh-access) for hosts: `trinkgenossin`, optionally: `delite`, `blue-shell`
 
 ```
 ssh barkeeper@trinkgenossin.wg.pub.solar
+```
 
+```
+# Add a few spaces to avoid leaking the secret to the shell history
    export GARAGE_RPC_SECRET=<secret-in-keepass>
+```
 
+Now, you can run the following command to check the cluster status:
+
+```
+garage status
+```
+
+Command to list all existing buckets:
+
+```
+garage bucket list
+```
+
+Creating a new bucket and access keys:
+
+```
 garage bucket create <bucket-name>
 garage key create <bucket-name>-key
 garage bucket allow <bucket-name> --read --write --key <bucket-name>-key
 ```
 
-Docs: https://garagehq.deuxfleurs.fr/documentation/quick-start/#creating-buckets-and-keys
+Full example for `mastodon` bucket:
+
+```
+garage bucket create mastodon
+
+garage key create mastodon-key
+
+garage bucket allow mastodon --read --write --key mastodon-key
+```
 
 Then [setup your favourite S3 client](https://garagehq.deuxfleurs.fr/documentation/connect/cli/)
 or use the bucket with any [S3 compatible software](https://garagehq.deuxfleurs.fr/documentation/connect/).
 
+Further reading:
+- https://garagehq.deuxfleurs.fr/documentation/quick-start/
+- https://garagehq.deuxfleurs.fr/documentation/connect/
+- https://garagehq.deuxfleurs.fr/documentation/connect/apps/#mastodon
+
 ### Notes on manual setup steps
 
 ```
 ssh barkeeper@trinkgenossin.wg.pub.solar
 
+# Add a few spaces to avoid leaking the secret to the shell history
     export GARAGE_RPC_SECRET=<secret-in-keepass>
 
 # Uses the default config /etc/garage.toml